We want to create our custom thumb drawable, but we missed something in the following snippet and now our drawable won't be displayed at all!
<?xml version="1.0" encoding="utf-8"?>
<!-- thumb.xml -->
<shape xmlns:android="http://schemas.android.com/apk/res/android"
android:innerRadiusRatio="4"
android:shape="ring"
android:thicknessRatio="5.333"
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>
<size
android:width="18dp"
android:height="18dp" />
<solid android:color="#880800FF" />
</shape>Type in the answer field the missing line so our drawable could be displayed correctly.